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Test Your Solution {#isv-parter-starter-integration-testing}
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To test your solution, you must have access to a merchant sandbox account to simulate a real transaction.  
Create an account on the [`Visa Acceptance Solutions` Sandbox](https://developer.visaacceptance.com/hello-world/sandbox.md "") page in the Developer Center.  
After you develop your integration, send a test transaction using the sandbox merchant org ID you created during the sandbox sign up. Ensure you include the merchant org ID in the headers as required and outlined in the product integration guides.  
You must also include your Partner Solution ID in the `clientReferenceInformation.partner.solutionId` field in the request body.